Sorry there haven’t been updates to this for a while but I’ll try to get back on it. Here is an awesome way to make Ubuntu look like Mac OS X Tiger. The site doesn’t tell you quite how to do everything, but it gives you all of what you need to do it. Very cool stuff.
I like Ubuntu, but if I had an OS that looked like Mac OS X, I would also want one that had everything else OS X did -proprietary codecs, support for ZFS (Leopard), and UNIX 03 certification status.